How long will the EcoFlow RIVER 2 Max 500 run a CPAP machine?
Can the EcoFlow RIVER 2 Max 500 start a CPAP machine?
Yes. A typical CPAP machine draws about 40 W running and up to 60 W starting, both inside the EcoFlow RIVER 2 Max 500’s published 500 W continuous and 1,000 W surge ratings. Your own unit’s nameplate can differ, so check it before relying on this.
How long will the EcoFlow RIVER 2 Max 500 run a CPAP machine?
Plan on 8.7 hr to 11 hr for a typical CPAP machine running continuously. That range applies 0.70 and 0.85 usable-capacity factors to the EcoFlow RIVER 2 Max 500’s 499 Wh, because inverter heat and battery management overhead consume the rest. Actual use depends on your own appliance and conditions.
Which station runs a CPAP machine longer than the EcoFlow RIVER 2 Max 500?
The EcoFlow DELTA 3 Plus is the next meaningful step up we’ve verified, at 18 hr or more on the same CPAP machine using the same conservative 0.70 factor, against 8.7 hr here. Only stations that pass both the continuous and surge checks count as upgrades in the table below, so it’s a fair comparison.
| Station | Capacity | Cautious | Best case | Continuous | Surge |
|---|---|---|---|---|---|
| EcoFlow RIVER 2 Max 500 | 499 Wh | 8.7 hr | 11 hr | Pass | Pass |
| EcoFlow DELTA 3 Plus | 1,024 Wh | 18 hr | 22 hr | Pass | Pass |
| Jackery Explorer 1000 v2 | 1,070 Wh | 19 hr | 23 hr | Pass | Pass |
| BLUETTI AC180 | 1,152 Wh | 20 hr | 24 hr | Pass | Pass |
| Jackery Explorer 2000 v2 | 2,042 Wh | 36 hr | 43 hr | Pass | Pass |
| BLUETTI Elite 200 V2 | 2,073.6 Wh | 36 hr | 44 hr | Pass | Unverified |
| EcoFlow DELTA Pro 3 | 4,096 Wh | 3.0 days | 3.6 days | Pass | Pass |
What load does this CPAP machine estimate assume?
These figures are typical values, not measurements of your unit. We assume 40 W running, 60 W starting and a 100% duty cycle for a CPAP machine. Models vary widely, so enter your nameplate figure in the calculator above for a number that fits your own appliance and how you use it.
A travel-sized CPAP with no heated humidifier. Humidifiers and heated tubes can multiply this.
